02wgee.pdf

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daimler-chrysler
TABLE OF CONTENTS
1.0
INTRODUCTION .........................................................1
1.1 SYSTEM COVERAGE ...............................................1
1.2 SIX -STEP TROUBLESHOOTING PROCEDURE ..........................1
2.0
IDENTIFICATION OF SYSTEM .............................................1
3.0
3.1 GENERAL DESCRIPTION ............................................1
3.2 FUNCTIONAL OPERATION ...........................................1
3.2.1 CONTROLLER MODES OF OPERATION ........................2
3.2.2 MIL ILLUMINATION ..........................................2
3.2.3 FREEZE FRAME ............................................2
3.2.4 SOLENOIDS ...............................................3
3.3 DIAGNOSTIC TROUBLE CODES ......................................5
3.3.1 ACTIVE (HARD) CODE ......................................5
3.3.3 STORED (INTERMITTENT) CODE .............................5
3.3.4 EMERGENCY RUNNING FUNCTION ...........................5
3.3.5 ERROR STATUS ............................................6
3.3.6 TROUBLE CODE ERASURE ..................................6
3.3.8 LIST OF DIAGNOSTIC TROUBLE CODES .......................7
3.3.9 DTC DESCRIPTIONS ........................................8
T
................................................22
ERROR MESSAGES ........................................22
3.5.1 DRBIII
T
3.5.2 DISPLAY IS NOT VISIBLE ...................................22
T
4.0
DISCLAIMERS, SAFETY, AND WARNINGS .................................22
4.1 DISCLAIMERS .....................................................22
4.2 SAFETY ..........................................................22
4.2.1 TECHNICIAN SAFETY INFORMATION .........................22
4.2.2 VEHICLE PREPARATION FOR TESTING ......................22
4.2.3 SERVICING SUB-ASSEMBLIES ..............................23
4.2.4 DRBIII
T
5.0
REQUIRED TOOLS AND EQUIPMENT .....................................24
6.0
GLOSSARY OF TERMS ..................................................25
6.1 ACRONYMS ......................................................25
6.2 DEFINITIONS .....................................................25
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3.5 DRBIII
SAFETY INFORMATION .............................23
4.3 WARNINGS .......................................................23
4.3.1 VEHICLE DAMAGE WARNINGS ..............................23
4.3.2 ROAD TESTING A COMPLAINT VEHICLE. .....................23
4.4 BULLETINS AND RECALLS ..........................................24
TABLE OF CONTENTS - Continued
7.0
DIAGNOSTIC INFORMATION AND PROCEDURES ...........................27
1-2/4-5 SOLENOID CIRCUIT (2, 71) ........................................32
2-3 SOLENOID CIRCUIT (3, 72) ...........................................35
3-4 SOLENOID CIRCUIT (4, 73) ...........................................38
ABS BRAKE MESSAGE (33) ..............................................41
ABS CAN MESSAGE INCORRECT (81) .....................................43
ABS CAN MESSAGE MISSING (38) ........................................44
ABS LF SENSOR MESSAGE (25) ..........................................47
ABS LR SENSOR MESSAGE (23) .........................................49
ABS RF SENSOR MESSAGE (24) .........................................51
ABS RR SENSOR MESSAGE (22) .........................................53
CAN BUS CIRCUIT (37) ..................................................55
ENGINE APP/TPS MESSAGE (26) .........................................58
ENGINE CAN MESSAGE INCORRECT (85) .................................61
ENGINE OVERSPEED (49) ...............................................65
ENGINE RPM MESSAGE (28) .............................................67
ENGINE T-CASE SW MESSAGE (44) .......................................69
ENGINE TEMP MESSAGE (43) ............................................71
ENGINE TORQUE REDUCTION (54) .......................................75
IMPROPER GEAR (55) ...................................................77
IMPROPER RATIO (50) ..................................................79
INPUT SENSOR OVERSPEED (15) ........................................81
INPUT SENSORS MISMATCH (14) .........................................83
INTERNAL CONTROLLER ................................................85
INTERNAL SHIFTER FAILURE (76) ........................................86
MOD. PRESS SOLENOID CIRCUIT (6) .....................................87
N2 INPUT SPEED SENSOR CIRCUIT (12) ..................................90
N3 INPUT SPEED SENSOR CIRCUIT (13) ..................................94
P/N OUTPUT CIRCUIT (9) ................................................98
PARK LOCK OUT SOLENOID CIRCUIT (8) .................................102
SENSOR SUPPLY VOLTAGE (11) .........................................105
SHIFT PRESS SOLENOID CIRCUIT (7) ....................................107
SHIFTER SIGNAL INVALID (17) ..........................................110
SOLENOID SUPPLY VOLTAGE (10) .......................................113
SOLENOID SUPPLY/WATCHDOG (56) .....................................115
SYSTEM OVERVOLTAGE (19). ...........................................117
SYSTEM UNDERVOLTAGE (21) ..........................................119
TCC OVER TEMP (53) ..................................................121
TCC SOLENOID CIRCUIT (5) ............................................122
TCC STUCK ON (52) ...................................................125
TRANS TEMP SENSOR ERRATIC (75) ....................................130
TRANS TEMP SENSOR SHORTED (20) ...................................132
TRANSMISSION SLIPPING (51) ..........................................135
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TABLE OF CONTENTS - Continued
OTHER THAN PARK OR NEUTRAL .......................................137
*ADAPTION PROCEDURE ...............................................138
*NO START CONDITION WITH NO DTCS PRESENT .........................139
*SHIFTER ERROR (1-10) ................................................140
VERIFICATION TESTS ..................................................142
8.0
COMPONENT LOCATIONS ..............................................143
8.1 ENGINE CONTROL MODULE .......................................143
8.3 TRANSMISSION SOLENOID ASSEMBLY ..............................144
9.0
CONNECTOR PINOUTS ................................................145
BRAKE LAMP SWITCH - GRAY 6 WAY ....................................145
C113 (DIESEL) - LT. GRAY (TRANSMISSION SIDE) ..........................145
CONTROLLER ANTILOCK BRAKE - BLACK 24 WAY .........................146
DATA LINK CONNECTOR - BLACK 16 WAY ................................146
DIAGNOSTIC JUNCTION PORT - BLACK 16 WAY ...........................147
FUSES (JB) ...........................................................151
JUNCTION BLOCK C2 (LHD) - BLACK 52 WAY .............................152
JUNCTION BLOCK C2 (RHD) - BLACK 52 WAY .............................153
JUNCTION BLOCK C3 - BLACK 52 WAY ...................................154
LEFT REAR LAMP ASSEMBLY - BLACK 6 WAY .............................155
FUSES (DIESEL) ......................................................157
BACK-UP LAMP RELAY (DIESEL) ........................................157
RIGHT REAR LAMP ASSEMBLY - BLACK 6 WAY ............................158
SHIFTER ASSEMBLY C2 (DIESEL)-6WAY ................................158
10.0 SCHEMATIC DIAGRAMS ................................................161
11.0 CHARTS AND GRAPHS ................................................163
11.1 SHIFT LEVER ERROR CODES ......................................163
11.2 SHIFTER SWITCH STATES .........................................163
11.3 5 VOLT SQUARE WAVE - TYPICAL PATTERN .........................164
11.4 TRANMISSION TEMP SENSOR .....................................165
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NOTES
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GENERAL INFORMATION
1.0 INTRODUCTION
tronic transmission is a conventional transmission
in that it uses hydraulically applied clutches to shift
a planetary gear train. However, the electronic
control system replaces many of the mechanical and
hydraulic components used in conventional trans-
mission valve bodies.
The ratios for the gear stages are obtained by 3
planetary gear sets. Fifth Gear is designed as an
Overdrive with a high speed ratio. The gears are
actuated electronically/hydraulically. The electronic
control system enables precise adaptation of pres-
sures to the respective operating conditions and to
the engine output during a shift phase, which
results in a significant improvement in shift qual-
ity.
The procedures contained in this manual include
all of the specifications, instructions, and graphics
needed to diagnose W5J400 Electronic Automatic
Transmission problems. The diagnostics in this
manual are based on the failure condition or symp-
tom being present at the time of diagnosis.
When repairs are required, refer to the appropri-
ate volume of the service information for the proper
removal and repair procedure.
READ THIS MANUAL BEFORE TRYING TO
DIAGNOSE A VEHICLE TROUBLE CODE.
Diagnostic procedures change every year. New
diagnostic systems may be added and/or carryover
systems may be enhanced. It is recommended that
you review the entire manual to become familiar
with all new and changed diagnostic procedures.
3.2 FUNCTIONAL OPERATION
The W5J400 electronic transmission has a fully
adaptive control system. The system performs its
functions based on continuous real-time sensor and
switch feedback information. In addition the TCM
receives information from the PCM/ECM (engine
management) and ABS (chassis systems) control-
lers over the CAN bus. The CAN bus is a high speed
communication bus that allows real time control
capability between various controllers. Most mes-
sages are sent every 20 milliseconds, this means
critical information can be shared between the
Transmission, Engine and ABS controllers. The
CAN bus is a two wire bus with a CAN C Bus (+)
circuit and a CAN C Bus (-) circuit. The CAN bus
uses a twisted pair of wires in the harness to reduce
the potential of radio and noise interference. The
CAN bus also uses a 120 ohm terminating resistor
in both the TCM and ABS modules. The module
terminating resistance is measured across both
CAN bus circuits at the TCM or ABS module, with
the PCM/ECM, TCM and ABS modules discon-
nected.
The control system automatically adapts to
changes in engine performance, vehicle speed, and
transmission temperature variations to provide
consistent shift quality. The control system ensures
that clutch operation during upshifting and down-
shifting is more responsive without increased
harshness. The TCM controls the actuation of sole-
noid valves for modulating shift pressure and gear
change. The required pressure level is calculated
from the load condition, engine speed. Power for the
transmission system is supplied through the
Shifter Assembly (no transmission control relay).
The TCM is located in the center console of the
vehicle.
The Transmission Control Module (TCM) contin-
uously checks for electrical problems, mechanical
problems, and some hydraulic problems. When a
problem is sensed, the TCM stores a diagnostic
1.1 SYSTEM COVERAGE
This diagnostic procedures manual covers all
2002 MY Grand Cherokee equipped with a W5J400
Automatic Transmission.
1.2 SIX -STEP TROUBLESHOOTING
PROCEDURE
Diagnosis of the W5J400 electronic transmission
is done in six basic steps:
Verification of complaint
Verification of any related symptoms
Symptom analysis
Problem isolation
Repair of isolated problem
Verification of proper operation
2.0 IDENTIFICATION OF
SYSTEM
The W5J400 Transmission family can be identi-
fied by the presence of a 13 pin electrical connector,
with a bayonet lock on the right hand side of the
transmission. The connector is oriented horizon-
tally.
3.0 SYSTEM DESCRIPTION AND
FUNCTIONAL OPERATION
3.1 GENERAL DESCRIPTION
The W5J400 electronic transmission is an elec-
tronically controlled five speed transmission with a
controlled slip torque converter. The W5J400 elec-
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